Stock ticker symbol lookup API

Question

Is there any sort of API that just offers a simple symbol lookup service  i e   input a company name and it will tell you the ticker symbol  I ve tried just screen-scraping Google Finance  but after a little while it rate limits you and you have to enter a CAPTCHA  I m trying to batch-lookup about 2000 ticker symbols  Any ideas

User · Answer

If you didn t want to sign up for a service  I d probably go back to the exchanges themselves  most of them aren t CAPTCHAed yet     The symbol lookup page for     NYSE is at http   www nyse com interface html SymbolLookup html NASDAQ is at http   www nasdaq com asp NasdaqSymLookup2 asp mode stock London Stock Exchange is at http   www londonstockexchange com en-gb pricesnews prices Trigger genericsearch htm ASX is at http   www asx com au asx research codeLookup do   etc

User · Answer

Google Finance has an API - you probably have to apply for a developers key  but at least you d save yourself the hassle of screen-scraping  http   code google com apis finance reference html

User · Answer

The NASDAQ site hosts separate CSV lists for ticker symbols in each stock exchange  NYSE  AMEX and NASDAQ   You need to complete the captcha and get the CSV dump   http   www nasdaq com screening company-list aspx

User · Answer

Google Finance does let you retrieve up to 100 stock quotes at once using the following URL   www google com finance info infotype infoquoteall amp q  ticker1   ticker2       tickern   For example   www google com finance info infotype infoquoteall amp q C JPM AIG  Someone has deciphered the available fields here   http   qsb-mac googlecode com svn trunk Vermilion Modules StockQuoter StockQuoter py  The current price   l   is real-time and the delay is on par with Yahoo Finance   There are a few quirks you should be aware of   A handful of stocks require an exchange prefix   For example  if you query  BTIM   you ll get a  Bad Request  error but  AMEX BTIM  works   A few stocks don t work even with the exchange prefix   For example  querying  FTWRD  and  NASDAQ FTWRD  both generate  Bad Request  errors even though Google Finance does have information for this NASDAQ stock   The  el  field  if present  tells you the current pre-market or after-hours price

User · Answer

You can use yahoo s symbol lookup like so      http   d yimg com autoc finance yahoo com autoc query yahoo amp callback YAHOO Finance SymbolSuggest ssCallback   Where query is the company name   You ll get something like this in return   YAHOO Finance SymbolSuggest ssCallback         ResultSet              Query    ya            Result                                    symbol    YHOO                    name    Yahoo  Inc                     exch    NMS                    type    S                    exchDisp    NASDAQ                                                symbol    AUY                    name    Yamana Gold  Inc                     exch    NYQ                    type    S                    exchDisp    NYSE                                                symbol    YZC                    name    Yanzhou Coal Mining Co  Ltd                     exch    NYQ                    type    S                    exchDisp    NYSE                                                symbol    YRI TO                    name    YAMANA GOLD INC COM NPV                    exch    TOR                    type    S                    exchDisp    Toronto                                                symbol    8046 TW                    name    NAN YA PRINTED CIR TWD10                    exch    TAI                    type    S                    exchDisp    Taiwan                                                symbol    600319 SS                    name    WEIFANG YAXING CHE  A CNY1                    exch    SHH                    type    S                    exchDisp    Shanghai                                                symbol    1991 HK                    name    TA YANG GROUP                    exch    HKG                    type    S                    exchDisp    Hong Kong                                                symbol    1303 TW                    name    NAN YA PLASTIC TWD10                    exch    TAI                    type    S                    exchDisp    Taiwan                                                symbol    0294 HK                    name    YANGTZEKIANG                    exch    HKG                    type    S                    exchDisp    Hong Kong                                                symbol    YAVY                    name    Yadkin Valley Financial Corp                     exch    NMS                    type    S                    exchDisp    NASDAQ                                      Which is JSON and very easy to work with   Hush    don t tell anybody

User · Answer

Your best bets are probably going with one of the other lookup services  still screen-scraping   and checking whether they don t require CAPTCHAs    Yahoo Finance MSN Money AlphaTrade Finance   The last appears the least likely to require a CAPTCHA at any point  but it s worth checking all three

User · Answer

Currently  the NASDAQ web site publicly provides CSV files containing bulk listings  -- it is broken up by first letter       http   www nasdaq com screening companies-by-name aspx letter A amp render download

User · Answer

Use YQL  a sql-like language to retrieve stuff from public api s  YQL Console  external link   It gives you a nice XML file to work with

User · Answer

You can send an HTTP request to http   finance yahoo com requesting symbols  names  quotes  and all sorts of other data  Data is returned as a  CSV so you can request multiple symbols in one query   So if you send   http   finance yahoo com d quotes csv s MSFT F ATT amp f sn   You ll get back something like    MSFT   Microsoft Corp   F   FORD MOTOR CO   ATT   AT amp T    Here is an article called Downloading Yahoo Data which includes the various tags used to request the data

User · Answer

You can use the  Company Search  operation in the Company Fundamentals API here  http   www mergent com servius

User · Answer

Use YQL and you don t need to worry  It s a query language by Yahoo and you can get all the stock data including the name of the company for the ticker  It s a REST API and it returns the results via XML or JSON   I have a full tutorial and source code on my site take a look  http   www jarloo com yahoo-stock-symbol-lookup

[api] Stock ticker symbol lookup API

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